Last weekend i spun the hub on my prop so i took it to prop place. I have a 3.0 L GM 4 cyl I/O in my 17 foot bowrider. 1st off they told me my prop was not worth reparing and was a huge 15 x 23. But its diamitor was worn down to the dia of a 14 " blade.<br /><br />Thats the history, my question is what size prop should i run? He thinks a 15 x 17 would be perfect. My rpm range is 4400-4800 rpms for the motor and with the old worn prop was only 4100 rpms. This kinda complicates things since the diamitor was only 14" not 15" what the prop used to be. To make mattesr a wee bit more interesting i want to get a 4 blade..<br /><br />Thanks,<br /><br />Big-E